Do people with SDHD mutations often develop multiple pheochromocytoma tumors?
Individuals with germline mutations in the succinate dehydrogenase subunit D (SDHD) gene are at a high risk for developing pheochromocytomas and paragangliomas. These are rare tumors that arise from the adrenal medulla or extra-adrenal ganglia 7.
What the research says
Research indicates that SDHD mutations are associated with multifocal disease, meaning patients may develop multiple tumors at different sites 2. Specifically, studies have shown that patients with SDHD mutations often present with extra-adrenal tumors, such as paragangliomas, or they may have multiple tumors identified during follow-up 6.
While both SDHB and SDHD mutations can cause these conditions, the clinical presentation can differ between them. For example, while SDHB mutation carriers are more likely to develop malignant disease, SDHD mutation carriers show a higher tendency to develop head and neck paragangliomas 8. In general, any individual with an SDHD mutation is expected to develop extra-adrenal tumors (either pheochromocytomas or paragangliomas) at the time of diagnosis or during subsequent monitoring 6.
What to ask your doctor
- What specific risks for multiple tumors are associated with my SDHD mutation?
- How often do patients with my specific genetic profile develop extra-adrenal tumors like paragangliomas?
- What is the typical timeline for tumor development in people with my mutation?
- What imaging or monitoring schedule is recommended to check for additional sites of disease?
This question is drawn from common patient questions about Cardiology and answered using cited medical research. We do not provide individualized advice.